Using ASMCA to Administer Disk Groups for Earlier Database Releases
Use Oracle ASM Configuration Assistant (ASMCA) to create and modify disk groups when you install earlier Oracle databases and Oracle RAC databases on Oracle Grid Infrastructure installations.
Starting with Oracle Database 11g Release 2, Oracle ASM is installed as part of an Oracle Grid Infrastructure installation, with Oracle Clusterware. You can no longer use Database Configuration Assistant (DBCA) to perform administrative tasks on Oracle ASM.
See Also:
Oracle Automatic Storage Management Administrator's Guide for details about configuring disk group compatibility for databases using Oracle Database 11g or earlier software with Oracle Grid Infrastructure 19c